/Engine/Source/Runtime/RenderCore/Public/ShaderCompilerCore.h
CallsGenerateOutputHash()before the compression, replacesFShaderCodewith the compressed data (if compression result was smaller).
void CompressOutput ( [FName](API\Runtime\Core\UObject\FName) ShaderCompressionFormat, [FOodleDataCompression::ECompressor](API\Runtime\Core\Compression\FOodleDataCompression__ECompress-) OodleCompressor, [FOodleDataCompression::ECompressionLevel](API\Runtime\Core\Compression\FOodleDataCompression__ECompress-_1) OodleLevel )